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Appliance Fix Guide

LG Microwave error code

LG Microwave Error F11

In convection cooking mode, the temperature is above 100°C even after the maximum time of 30 minutes.

In convection cooking mode, the temperature is above 100°C even after the maximum time of 30 minutes.

Updated Aug 18, 2026
⚠️ CHECK WARRANTY / AGE$100 - $250 Range
LG microwave repair guide for error F11
Error codeF11Microwave

Try these first

Start here before buying a part or taking the appliance apart.

  1. 1
    Step 1

    Unplug the microwave.

  2. 2
    Stop and arrange professional service

    If the error code returns after a full power reset, stop DIY internal work. Microwave internal components can retain hazardous voltage even after unplugging. Internal diagnosis and repair should be handled by a qualified technician.

A quick explanation

What does F11 mean?

In convection cooking mode, the temperature is above 100°C even after the maximum time of 30 minutes.

The answer you came for

How to fix LG microwave error F11

Start with the safest checks and work from simple to technical.

Microwave internal components can retain hazardous voltage even after unplugging. The steps below are limited to safe external checks. Internal diagnosis and repair should be handled by a qualified professional.

  1. 1

    Step 1

    Unplug the microwave.

  2. 2

    Stop and arrange professional service

    If the error code returns after a full power reset, stop DIY internal work. Microwave internal components can retain hazardous voltage even after unplugging. Internal diagnosis and repair should be handled by a qualified technician.

    What you should see: You avoid opening the cabinet or touching internal high-voltage parts.
If the code comes back

Do not keep replacing parts based only on the code. Repeat the safe checks above. If the fault remains, stop and arrange qualified service rather than ordering from the code alone.

What may be causing it?

  • Communication problem between the inverter and the main control board
  • Loose or disconnected wires
  • Faulty inverter board
  • Faulty main control board

These are possibilities to investigate, not proof that one part has failed.

Recommended part

Possible technician-diagnosed component

Inverter Board

Price noted in the current guide: $130-$200

Why this part is shown: A technician may identify Inverter Board on some LG microwave models after diagnosis. This is not a DIY installation guide.

Do not open the microwave cabinet or attempt internal replacement. Confirm model compatibility with a qualified technician before any purchase.

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Replacement options

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Make the money decision

Repair or replace calculator

Use the age and total repair estimate to get a simple comparison. This is guidance, not a guarantee.